Study of CP asymmetry in B^{0}-B[over ¯]^{0} mixing with inclusive dilepton events

J P Lees; V Poireau; V Tisserand; E Grauges; A Palano; G Eigen; B Stugu; D N Brown; L T Kerth; Yu G Kolomensky; M J Lee; G Lynch; H Koch; T Schroeder; C Hearty; T S Mattison; J A McKenna; R Y So; A Khan; V E Blinov; A R Buzykaev; V P Druzhinin; V B Golubev; E A Kravchenko; A P Onuchin; S I Serednyakov; Yu I Skovpen; E P Solodov; K Yu Todyshev; A J Lankford; M Mandelkern; B Dey; J W Gary; O Long; C Campagnari; M Franco Sevilla; T M Hong; D Kovalskyi; J D Richman; C A West; A M Eisner; W S Lockman; W Panduro Vazquez; B A Schumm; A Seiden; D S Chao; C H Cheng; B Echenard; K T Flood; D G Hitlin; T S Miyashita; P Ongmongkolkul; F C Porter; M Röhrken; R Andreassen; Z Huard; B T Meadows; B G Pushpawela; M D Sokoloff; L Sun; P C Bloom; W T Ford; A Gaz; J G Smith; S R Wagner; R Ayad; W H Toki; B Spaan; D Bernard; M Verderi; S Playfer; D Bettoni; C Bozzi; R Calabrese; G Cibinetto; E Fioravanti; I Garzia; E Luppi; L Piemontese; V Santoro; A Calcaterra; R de Sangro; G Finocchiaro; S Martellotti; P Patteri; I M Peruzzi; M Piccolo; M Rama; A Zallo; R Contri; M Lo Vetere; M R Monge; S Passaggio; C Patrignani; E Robutti; B Bhuyan; V Prasad; A Adametz; U Uwer; H M Lacker; P D Dauncey; U Mallik; C Chen; J Cochran; S Prell; H Ahmed; A V Gritsan; N Arnaud; M Davier; D Derkach; G Grosdidier; F Le Diberder; A M Lutz; B Malaescu; P Roudeau; A Stocchi; G Wormser; D J Lange; D M Wright; J P Coleman; J R Fry; E Gabathuler; D E Hutchcroft; D J Payne; C Touramanis; A J Bevan; F Di Lodovico; R Sacco; G Cowan; J Bougher; D N Brown; C L Davis; A G Denig; M Fritsch; W Gradl; K Griessinger; A Hafner; K R Schubert; R J Barlow; G D Lafferty; R Cenci; B Hamilton; A Jawahery; D A Roberts; R Cowan; G Sciolla; R Cheaib; P M Patel; S H Robertson; N Neri; F Palombo; L Cremaldi; R Godang; P Sonnek; D J Summers; M Simard; P Taras; G De Nardo; G Onorato; C Sciacca; M Martinelli; G Raven; C P Jessop; J M LoSecco; K Honscheid; R Kass; E Feltresi; M Margoni; M Morandin; M Posocco; M Rotondo; G Simi; F Simonetto; R Stroili; S Akar; E Ben-Haim; M Bomben; G R Bonneaud; H Briand; G Calderini; J Chauveau; Ph Leruste; G Marchiori; J Ocariz; M Biasini; E Manoni; S Pacetti; A Rossi; C Angelini; G Batignani; S Bettarini; M Carpinelli; G Casarosa; A Cervelli; M Chrzaszcz; F Forti; M A Giorgi; A Lusiani; B Oberhof; E Paoloni; A Perez; G Rizzo; J J Walsh; D Lopes Pegna; J Olsen; A J S Smith; R Faccini; F Ferrarotto; F Ferroni; M Gaspero; L Li Gioi; A Pilloni; G Piredda; C Bünger; S Dittrich; O Grünberg; M Hess; T Leddig; C Voß; R Waldi; T Adye; E O Olaiya; F F Wilson; S Emery; G Vasseur; F Anulli; D Aston; D J Bard; C Cartaro; M R Convery; J Dorfan; G P Dubois-Felsmann; W Dunwoodie; M Ebert; R C Field; B G Fulsom; M T Graham; C Hast; W R Innes; P Kim; D W G S Leith; P Lewis; D Lindemann; S Luitz; V Luth; H L Lynch; D B MacFarlane; D R Muller; H Neal; M Perl; T Pulliam; B N Ratcliff; A Roodman; A A Salnikov; R H Schindler; A Snyder; D Su; M K Sullivan; J Va'vra; W J Wisniewski; H W Wulsin; M V Purohit; R M White; J R Wilson; A Randle-Conde; S J Sekula; M Bellis; P R Burchat; E M T Puccio; M S Alam; J A Ernst; R Gorodeisky; N Guttman; D R Peimer; A Soffer; S M Spanier; J L Ritchie; A M Ruland; R F Schwitters; B C Wray; J M Izen; X C Lou; F Bianchi; F De Mori; A Filippi; D Gamba; L Lanceri; L Vitale; F Martinez-Vidal; A Oyanguren; P Villanueva-Perez; J Albert; Sw Banerjee; A Beaulieu; F U Bernlochner; H H F Choi; G J King; R Kowalewski; M J Lewczuk; T Lueck; I M Nugent; J M Roney; R J Sobie; N Tasneem; T J Gershon; P F Harrison; T E Latham; H R Band; S Dasu; Y Pan; R Prepost; S L Wu; (BABAR Collaboration)

doi:10.1103/PhysRevLett.114.081801

Study of CP asymmetry in B^{0}-B[over ¯]^{0} mixing with inclusive dilepton events

Phys Rev Lett. 2015 Feb 27;114(8):081801. doi: 10.1103/PhysRevLett.114.081801. Epub 2015 Feb 25.

Authors

J P Lees¹, V Poireau¹, V Tisserand¹, E Grauges², A Palano^{3

4}, G Eigen⁵, B Stugu⁵, D N Brown⁶, L T Kerth⁶, Yu G Kolomensky⁶, M J Lee⁶, G Lynch⁶, H Koch⁷, T Schroeder⁷, C Hearty⁸, T S Mattison⁸, J A McKenna⁸, R Y So⁸, A Khan⁹, V E Blinov^{10

11

12}, A R Buzykaev¹⁰, V P Druzhinin^{10

11}, V B Golubev^{10

11}, E A Kravchenko^{10

11}, A P Onuchin^{10

11

12}, S I Serednyakov^{10

11}, Yu I Skovpen^{10

11}, E P Solodov^{10

11}, K Yu Todyshev^{10

11}, A J Lankford¹³, M Mandelkern¹³, B Dey¹⁴, J W Gary¹⁴, O Long¹⁴, C Campagnari¹⁵, M Franco Sevilla¹⁵, T M Hong¹⁵, D Kovalskyi¹⁵, J D Richman¹⁵, C A West¹⁵, A M Eisner¹⁶, W S Lockman¹⁶, W Panduro Vazquez¹⁶, B A Schumm¹⁶, A Seiden¹⁶, D S Chao¹⁷, C H Cheng¹⁷, B Echenard¹⁷, K T Flood¹⁷, D G Hitlin¹⁷, T S Miyashita¹⁷, P Ongmongkolkul¹⁷, F C Porter¹⁷, M Röhrken¹⁷, R Andreassen¹⁸, Z Huard¹⁸, B T Meadows¹⁸, B G Pushpawela¹⁸, M D Sokoloff¹⁸, L Sun¹⁸, P C Bloom¹⁹, W T Ford¹⁹, A Gaz¹⁹, J G Smith¹⁹, S R Wagner¹⁹, R Ayad²⁰, W H Toki²⁰, B Spaan²¹, D Bernard²², M Verderi²², S Playfer²³, D Bettoni²⁴, C Bozzi²⁴, R Calabrese^{24

25}, G Cibinetto^{24

25}, E Fioravanti^{24

25}, I Garzia^{24

25}, E Luppi^{24

25}, L Piemontese²⁴, V Santoro²⁴, A Calcaterra²⁶, R de Sangro²⁶, G Finocchiaro²⁶, S Martellotti²⁶, P Patteri²⁶, I M Peruzzi²⁶, M Piccolo²⁶, M Rama²⁶, A Zallo²⁶, R Contri^{27

28}, M Lo Vetere^{27

28}, M R Monge^{27

28}, S Passaggio²⁷, C Patrignani^{27

28}, E Robutti²⁷, B Bhuyan²⁹, V Prasad²⁹, A Adametz³⁰, U Uwer³⁰, H M Lacker³¹, P D Dauncey³², U Mallik³³, C Chen³⁴, J Cochran³⁴, S Prell³⁴, H Ahmed³⁵, A V Gritsan³⁶, N Arnaud³⁷, M Davier³⁷, D Derkach³⁷, G Grosdidier³⁷, F Le Diberder³⁷, A M Lutz³⁷, B Malaescu³⁷, P Roudeau³⁷, A Stocchi³⁷, G Wormser³⁷, D J Lange³⁸, D M Wright³⁸, J P Coleman³⁹, J R Fry³⁹, E Gabathuler³⁹, D E Hutchcroft³⁹, D J Payne³⁹, C Touramanis³⁹, A J Bevan⁴⁰, F Di Lodovico⁴⁰, R Sacco⁴⁰, G Cowan⁴¹, J Bougher⁴², D N Brown⁴², C L Davis⁴², A G Denig⁴³, M Fritsch⁴³, W Gradl⁴³, K Griessinger⁴³, A Hafner⁴³, K R Schubert⁴³, R J Barlow⁴⁴, G D Lafferty⁴⁴, R Cenci⁴⁵, B Hamilton⁴⁵, A Jawahery⁴⁵, D A Roberts⁴⁵, R Cowan⁴⁶, G Sciolla⁴⁶, R Cheaib⁴⁷, P M Patel⁴⁷, S H Robertson⁴⁷, N Neri⁴⁸, F Palombo^{48

49}, L Cremaldi⁵⁰, R Godang⁵⁰, P Sonnek⁵⁰, D J Summers⁵⁰, M Simard⁵¹, P Taras⁵¹, G De Nardo^{52

53}, G Onorato^{52

53}, C Sciacca^{52

53}, M Martinelli⁵⁴, G Raven⁵⁴, C P Jessop⁵⁵, J M LoSecco⁵⁵, K Honscheid⁵⁶, R Kass⁵⁶, E Feltresi^{57

58}, M Margoni^{57

58}, M Morandin⁵⁷, M Posocco⁵⁷, M Rotondo⁵⁷, G Simi^{57

58}, F Simonetto^{57

58}, R Stroili^{57

58}, S Akar⁵⁹, E Ben-Haim⁵⁹, M Bomben⁵⁹, G R Bonneaud⁵⁹, H Briand⁵⁹, G Calderini⁵⁹, J Chauveau⁵⁹, Ph Leruste⁵⁹, G Marchiori⁵⁹, J Ocariz⁵⁹, M Biasini^{60

61}, E Manoni⁶⁰, S Pacetti^{60

61}, A Rossi⁶⁰, C Angelini^{62

63}, G Batignani^{62

63}, S Bettarini^{62

63}, M Carpinelli^{62

63}, G Casarosa^{62

63}, A Cervelli^{62

63}, M Chrzaszcz⁶², F Forti^{62

63}, M A Giorgi^{62

63}, A Lusiani^{62

64}, B Oberhof^{62

63}, E Paoloni^{62

63}, A Perez⁶², G Rizzo^{62

63}, J J Walsh⁶², D Lopes Pegna⁶⁵, J Olsen⁶⁵, A J S Smith⁶⁵, R Faccini^{66

67}, F Ferrarotto⁶⁶, F Ferroni^{66

67}, M Gaspero^{66

67}, L Li Gioi⁶⁶, A Pilloni^{66

67}, G Piredda⁶⁶, C Bünger⁶⁸, S Dittrich⁶⁸, O Grünberg⁶⁸, M Hess⁶⁸, T Leddig⁶⁸, C Voß⁶⁸, R Waldi⁶⁸, T Adye⁶⁹, E O Olaiya⁶⁹, F F Wilson⁶⁹, S Emery⁷⁰, G Vasseur⁷⁰, F Anulli⁷¹, D Aston⁷¹, D J Bard⁷¹, C Cartaro⁷¹, M R Convery⁷¹, J Dorfan⁷¹, G P Dubois-Felsmann⁷¹, W Dunwoodie⁷¹, M Ebert⁷¹, R C Field⁷¹, B G Fulsom⁷¹, M T Graham⁷¹, C Hast⁷¹, W R Innes⁷¹, P Kim⁷¹, D W G S Leith⁷¹, P Lewis⁷¹, D Lindemann⁷¹, S Luitz⁷¹, V Luth⁷¹, H L Lynch⁷¹, D B MacFarlane⁷¹, D R Muller⁷¹, H Neal⁷¹, M Perl⁷¹, T Pulliam⁷¹, B N Ratcliff⁷¹, A Roodman⁷¹, A A Salnikov⁷¹, R H Schindler⁷¹, A Snyder⁷¹, D Su⁷¹, M K Sullivan⁷¹, J Va'vra⁷¹, W J Wisniewski⁷¹, H W Wulsin⁷¹, M V Purohit⁷², R M White⁷², J R Wilson⁷², A Randle-Conde⁷³, S J Sekula⁷³, M Bellis⁷⁴, P R Burchat⁷⁴, E M T Puccio⁷⁴, M S Alam⁷⁵, J A Ernst⁷⁵, R Gorodeisky⁷⁶, N Guttman⁷⁶, D R Peimer⁷⁶, A Soffer⁷⁶, S M Spanier⁷⁷, J L Ritchie⁷⁸, A M Ruland⁷⁸, R F Schwitters⁷⁸, B C Wray⁷⁸, J M Izen⁷⁹, X C Lou⁷⁹, F Bianchi^{80

81}, F De Mori^{80

81}, A Filippi⁸⁰, D Gamba^{80

81}, L Lanceri^{82

83}, L Vitale^{82

83}, F Martinez-Vidal⁸⁴, A Oyanguren⁸⁴, P Villanueva-Perez⁸⁴, J Albert⁸⁵, Sw Banerjee⁸⁵, A Beaulieu⁸⁵, F U Bernlochner⁸⁵, H H F Choi⁸⁵, G J King⁸⁵, R Kowalewski⁸⁵, M J Lewczuk⁸⁵, T Lueck⁸⁵, I M Nugent⁸⁵, J M Roney⁸⁵, R J Sobie⁸⁵, N Tasneem⁸⁵, T J Gershon⁸⁶, P F Harrison⁸⁶, T E Latham⁸⁶, H R Band⁸⁷, S Dasu⁸⁷, Y Pan⁸⁷, R Prepost⁸⁷, S L Wu⁸⁷; (BABAR Collaboration)

Affiliations

¹ Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Université de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux, France.
² Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona, Spain.
³ INFN Sezione di Bari, I-70126 Bari, Italy.
⁴ Dipartimento di Fisica, Università di Bari, I-70126 Bari, Italy.
⁵ University of Bergen, Institute of Physics, N-5007 Bergen, Norway.
⁶ Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USA.
⁷ Ruhr Universität Bochum, Institut für Experimentalphysik 1, D-44780 Bochum, Germany.
⁸ University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1.
⁹ Brunel University, Uxbridge, Middlesex UB8 3PH, United Kingdom.
¹⁰ Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090, Russia.
¹¹ Novosibirsk State University, Novosibirsk 630090, Russia.
¹² Novosibirsk State Technical University, Novosibirsk 630092, Russia.
¹³ University of California at Irvine, Irvine, California 92697, USA.
¹⁴ University of California at Riverside, Riverside, California 92521, USA.
¹⁵ University of California at Santa Barbara, Santa Barbara, California 93106, USA.
¹⁶ University of California at Santa Cruz, Institute for Particle Physics, Santa Cruz, California 95064, USA.
¹⁷ California Institute of Technology, Pasadena, California 91125, USA.
¹⁸ University of Cincinnati, Cincinnati, Ohio 45221, USA.
¹⁹ University of Colorado, Boulder, Colorado 80309, USA.
²⁰ Colorado State University, Fort Collins, Colorado 80523, USA.
²¹ Technische Universität Dortmund, Fakultät Physik, D-44221 Dortmund, Germany.
²² Laboratoire Leprince-Ringuet, Ecole Polytechnique, CNRS/IN2P3, F-91128 Palaiseau, France.
²³ University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom.
²⁴ INFN Sezione di Ferrara, I-44122 Ferrara, Italy.
²⁵ Dipartimento di Fisica e Scienze della Terra, Università di Ferrara, I-44122 Ferrara, Italy.
²⁶ INFN Laboratori Nazionali di Frascati, I-00044 Frascati, Italy.
²⁷ INFN Sezione di Genova, I-16146 Genova, Italy.
²⁸ Dipartimento di Fisica, Università di Genova, I-16146 Genova, Italy.
²⁹ Indian Institute of Technology Guwahati, Guwahati, Assam 781 039, India.
³⁰ Universität Heidelberg, Physikalisches Institut, D-69120 Heidelberg, Germany.
³¹ Humboldt-Universität zu Berlin, Institut für Physik, D-12489 Berlin, Germany.
³² Imperial College London, London SW7 2AZ, United Kingdom.
³³ University of Iowa, Iowa City, Iowa 52242, USA.
³⁴ Iowa State University, Ames, Iowa 50011-3160, USA.
³⁵ Physics Department, Jazan University, Jazan 22822, Kingdom of Saudi Arabia.
³⁶ Johns Hopkins University, Baltimore, Maryland 21218, USA.
³⁷ Laboratoire de l'Accélérateur Linéaire, IN2P3/CNRS et Université Paris-Sud 11, Centre Scientifique d'Orsay, F-91898 Orsay Cedex, France.
³⁸ Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
³⁹ University of Liverpool, Liverpool L69 7ZE, United Kingdom.
⁴⁰ Queen Mary, University of London, London E1 4NS, United Kingdom.
⁴¹ University of London, Royal Holloway and Bedford New College, Egham, Surrey TW20 0EX, United Kingdom.
⁴² University of Louisville, Louisville, Kentucky 40292, USA.
⁴³ Johannes Gutenberg-Universität Mainz, Institut für Kernphysik, D-55099 Mainz, Germany.
⁴⁴ University of Manchester, Manchester M13 9PL, United Kingdom.
⁴⁵ University of Maryland, College Park, Maryland 20742, USA.
⁴⁶ Massachusetts Institute of Technology, Laboratory for Nuclear Science, Cambridge, Massachusetts 02139, USA.
⁴⁷ McGill University, Montréal, Québec, Canada H3A 2T8.
⁴⁸ INFN Sezione di Milano, I-20133 Milano, Italy.
⁴⁹ Dipartimento di Fisica, Università di Milano, I-20133 Milano, Italy.
⁵⁰ University of Mississippi, University, Mississippi 38677, USA.
⁵¹ Université de Montréal, Physique des Particules, Montréal, Québec, Canada H3C 3J7.
⁵² INFN Sezione di Napoli, I-80126 Napoli, Italy.
⁵³ Dipartimento di Scienze Fisiche, Università di Napoli Federico II, I-80126 Napoli, Italy.
⁵⁴ NIKHEF, National Institute for Nuclear Physics and High Energy Physics, NL-1009 DB Amsterdam, Netherlands.
⁵⁵ University of Notre Dame, Notre Dame, Indiana 46556, USA.
⁵⁶ Ohio State University, Columbus, Ohio 43210, USA.
⁵⁷ INFN Sezione di Padova, I-35131 Padova, Italy.
⁵⁸ Dipartimento di Fisica, Università di Padova, I-35131 Padova, Italy.
⁵⁹ Laboratoire de Physique Nucléaire et de Hautes Energies, IN2P3/CNRS, Université Pierre et Marie Curie-Paris6, Université Denis Diderot-Paris7, F-75252 Paris, France.
⁶⁰ INFN Sezione di Perugia, I-06123 Perugia, Italy.
⁶¹ Dipartimento di Fisica, Università di Perugia, I-06123 Perugia, Italy.
⁶² INFN Sezione di Pisa, I-56127 Pisa, Italy.
⁶³ Dipartimento di Fisica, Università di Pisa, I-56127 Pisa, Italy.
⁶⁴ Scuola Normale Superiore di Pisa, I-56127 Pisa, Italy.
⁶⁵ Princeton University, Princeton, New Jersey 08544, USA.
⁶⁶ INFN Sezione di Roma, I-00185 Roma, Italy.
⁶⁷ Dipartimento di Fisica, Università di Roma La Sapienza, I-00185 Roma, Italy.
⁶⁸ Universität Rostock, D-18051 Rostock, Germany.
⁶⁹ Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, United Kingdom.
⁷⁰ CEA, Irfu, SPP, Centre de Saclay, F-91191 Gif-sur-Yvette, France.
⁷¹ SLAC National Accelerator Laboratory, Stanford, California 94309 USA.
⁷² University of South Carolina, Columbia, South Carolina 29208, USA.
⁷³ Southern Methodist University, Dallas, Texas 75275, USA.
⁷⁴ Stanford University, Stanford, California 94305-4060, USA.
⁷⁵ State University of New York, Albany, New York 12222, USA.
⁷⁶ Tel Aviv University, School of Physics and Astronomy, Tel Aviv 69978, Israel.
⁷⁷ University of Tennessee, Knoxville, Tennessee 37996, USA.
⁷⁸ University of Texas at Austin, Austin, Texas 78712, USA.
⁷⁹ University of Texas at Dallas, Richardson, Texas 75083, USA.
⁸⁰ INFN Sezione di Torino, I-10125 Torino, Italy.
⁸¹ Dipartimento di Fisica, Università di Torino, I-10125 Torino, Italy.
⁸² INFN Sezione di Trieste, I-34127 Trieste, Italy.
⁸³ Dipartimento di Fisica, Università di Trieste, I-34127 Trieste, Italy.
⁸⁴ IFIC, Universitat de Valencia-CSIC, E-46071 Valencia, Spain.
⁸⁵ University of Victoria, Victoria, British Columbia, Canada V8W 3P6.
⁸⁶ Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom.
⁸⁷ University of Wisconsin, Madison, Wisconsin 53706, USA.

PMID: 25768754
DOI: 10.1103/PhysRevLett.114.081801

Abstract

We present a measurement of the asymmetry A_{CP} between same-sign inclusive dilepton samples ℓ^{+}ℓ^{+} and ℓ^{-}ℓ^{-} (ℓ=e, μ) from semileptonic B decays in ϒ(4S)→BB[over ¯] events, using the complete data set recorded by the BABAR experiment near the ϒ(4S) resonance, corresponding to 471×10^{6} BB[over ¯] pairs. The asymmetry A_{CP} allows comparison between the mixing probabilities P(B[over ¯]^{0}→B^{0}) and P(B^{0}→B[over ¯]^{0}), and therefore probes CP and T violation. The result, A_{CP}=[-3.9±3.5(stat)±1.9(syst)]×10^{-3}, is consistent with the standard model expectation.